Fanuc MPG, Manual Pulse Generator

Here is where the detent is done. A leaf spring pushes a roller angainst the gear like disk. The wheel rotation is light enough and the sping force heavy enough to keep the wheel centered on a mark when the wheel is released. This MPG happens to be in good shape.

This detent roller is badly worn and made for two very light detents per wheel mark. The center cylinder should be round and smooth and _not_ look like a gear. I will need to make a new one. (The ball point pen tip is included for size reference.)

Here is where the roller lives.

I made a new roller from mild steel to the above dimensions. The MPG works like a new one now.

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Rev. Date: 2015/07/17 23:50 UTC KW